What sensor can I use on RODI container to limit refill??

[m0nkie]

Hello.

I have a large 100gal container for RODI water. I want to limit the # of times to refill. Is there a good sensor to use to control the RODI on/off??

Meaning.. i dont want it to refill every time water level is under the float switch. I want the 100gal to get used up and refill once it's at the bottom.

Right now i just have a drilled plastic float switch and RODI would refill after every tank topoff

I think APEX has something similar but requires some coding. Wonder if theres any other simpler units?

Thanks

 

[tzabor10]

Smart Buddie Put it on a timer and it will also siphon off the first 30 seconds of flow. No TDS creep

 

[Snoopy 67]

A regular float valve will shut off an RO when the container is full, then shut off the supply water until the tank need refilling.

PVC Mini Float Valve With Fixed Arm & 1/2" MIPT Inlet | U.S. Plastic Corp.

All standard PVC bodies are made from NSF approved materials and replaceable seals are made of long-wearing, chemical resistant Santopren...

www.usplastic.com

 

[bblumberg]

It's not off the shelf, but you could consider something like this...

Build Your Own Smart Contactless Liquid Sensor with Home Assistant and XKC Y25 - Easy DIY Tutorial! - Kiril Peyanski's Blog

What contactless liquid sensor is? Can you make such sensor smart by your own? Proudly present you another DIY smart sensor named XKC Y25 that is working with

peyanski.com

I am working on an auto top off based on these type of sensors for my frag tank. For some reason, my Tunze simply doesn't work well in that sump.

 

[benbalter]

I have 2 55 gallon drums in the garage. 1 with salt water and the other with rodi water. Both fill with the same rodi unit. To keep the salt water at a Set salinity level the neptune turns on the water to fill the barrel and shuts off at a set point. When the brine barrel is filled a solenoid shuts off the rodi water and the Brin fill pump. Till I add salt and start it backup, this way I have auto top off to 2 marine tanks and 1 fresh. With a shared water source. Plus I have auto water changes, which is a God sent!